body {
    background-color: aliceblue;
    user-select: none;
}
.content .main {
    width: 81%;
    margin-right: 3%;
    height: auto;
    background: #fff;
    float: right;
    margin-top: 30px;
    max-height: 90vh;
    overflow: auto;
    border-radius: 5px;
    padding: 80px 10px 80px 20px;
    position: relative;
}
.top {
    margin-bottom: 20px;
    float: right;
}
.top .search {
    height: 2em;
    width: 20em;
    border: 1px solid #bababa;
    border-radius: 5px;
}
.top .add {
    height: 2em;
    width: 6em;
    color: #fff;
    background-color: #428aff;
    border: none;
    border-radius: 5px;
    float: right;
}
.content_table{
    float: right;
}
table{
    border-collapse: collapse;
}
thead th {
    width: 40em;
    height: 40px;
}
thead tr{
    background-color: #f5f5f5;
}
.number, .short {
    width: 5em;
}
tbody td{
    text-align: center;
}
tbody tr{
    height: 4em;
}
tr{
    border-bottom: 1px solid #eaeaea;
}